VR: Soften the floor grid

chrome/browser/android/vr_shell/vr_shell_renderer.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_
 
 #include <memory>
 #include <queue>
 #include <vector>
@@ skipping 229 matching lines @@
  private:
   GLuint model_view_proj_matrix_handle_;
   GLuint scene_radius_handle_;
   GLuint center_color_handle_;
   GLuint edge_color_handle_;
   GLuint opacity_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(GradientQuadRenderer);
 };
 
-class GradientGridRenderer : public BaseRenderer {
+class GradientGridRenderer : public BaseQuadRenderer {
  public:
   GradientGridRenderer();
   ~GradientGridRenderer() override;
 
   void Draw(const vr::Mat4f& view_proj_matrix,
             SkColor edge_color,
             SkColor center_color,
+            SkColor grid_color,
             int gridline_count,
             float opacity);
 
  private:
-  void MakeGridLines(int gridline_count);
-
-  GLuint vertex_buffer_ = 0;
   GLuint model_view_proj_matrix_handle_;
   GLuint scene_radius_handle_;
   GLuint center_color_handle_;
   GLuint edge_color_handle_;
+  GLuint grid_color_handle_;
   GLuint opacity_handle_;
-  std::vector<Line3d> grid_lines_;
+  GLuint lines_count_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(GradientGridRenderer);
 };
 
 class VrShellRenderer {
  public:
   VrShellRenderer();
   ~VrShellRenderer();
 
   ExternalTexturedQuadRenderer* GetExternalTexturedQuadRenderer();
@@ skipping 16 matching lines @@
   std::unique_ptr<ControllerRenderer> controller_renderer_;
   std::unique_ptr<GradientQuadRenderer> gradient_quad_renderer_;
   std::unique_ptr<GradientGridRenderer> gradient_grid_renderer_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShellRenderer);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_